/*
 * 
 */

package com.memorytech.starchive;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Collection;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.BeepManager;
import com.google.zxing.client.android.CaptureActivity;
import com.google.zxing.client.android.CaptureActivityHandler;
import com.google.zxing.client.android.FinishListener;
import com.google.zxing.client.android.InactivityTimer;
import com.google.zxing.client.android.IntentSource;
import com.google.zxing.client.android.PreferencesActivity;
import jp.co.memory_tech.starchive.R;
import com.google.zxing.client.android.ViewfinderView;
import com.google.zxing.client.android.camera.CameraManager;
import com.google.zxing.client.android.result.ResultHandler;
import com.google.zxing.client.android.result.ResultHandlerFactory;
import com.memorytech.starchive.db.SQLiteProvider;
import com.memorytech.starchive.entity.HistoryBarcode;
import com.memorytech.starchive.interfaceclass.BarcodeReaderInfo;

/**
 * The Class BarcodeCaptureActivity.
 */
public class BarcodeCaptureActivity extends CaptureActivity {

    private static final String TAG =
            BarcodeCaptureActivity.class.getSimpleName();
    private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;

    // private CameraManager cameraManager;
    // private CaptureActivityHandler handler;
    private Result savedResultToShow;
    // private ViewfinderView viewfinderView;
    private Result lastResult;
    // private boolean hasSurface;
    private IntentSource source;
    private Collection<BarcodeFormat> decodeFormats;
    private String characterSet;
    private InactivityTimer inactivityTimer;
    // private BeepManager beepManager;
    private TextView statusView;

    private LinearLayout layoutLoadingProgress;
    private BarcodeCaptureHandler barcodeCaptureHandler;

    /*
     * (non-Javadoc)
     * @see com.google.zxing.client.android.CaptureActivity#getViewfinderView()
     */
    @Override
    public ViewfinderView getViewfinderView() {
        return viewfinderView;
    }

    /*
     * (non-Javadoc)
     * @see com.google.zxing.client.android.CaptureActivity#getHandler()
     */
    @Override
    public Handler getHandler() {
        return handler;
    }

    /*
     * (non-Javadoc)
     * @see com.google.zxing.client.android.CaptureActivity#getCameraManager()
     */
    @Override
    protected CameraManager getCameraManager() {
        return cameraManager;
    }

    /*
     * (non-Javadoc)
     * @see
     * com.google.zxing.client.android.CaptureActivity#onCreate(android.os.Bundle
     * )
     */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        Window window = getWindow();
        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setContentView(R.layout.barcodecamera);

        hasSurface = false;
        // historyManager = new HistoryManager(this);
        // historyManager.trimHistory();
        inactivityTimer = new InactivityTimer(this);
        beepManager = new BeepManager(this);

        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i("Tamle", "Camera is onResume");

        // CameraManager must be initialized here, not in onCreate(). This is
        // necessary because we don't
        // want to open the camera driver and measure the screen size if we're
        // going to show the help on
        // first launch. That led to bugs where the scanning rectangle was the
        // wrong size and partially
        // off screen.
        ((TextView) findViewById(R.id.title))
                .setText(getString(jp.co.memory_tech.starchive.R.string.camera));
        cameraManager = new CameraManager(this);

        viewfinderView = (ViewfinderView) findViewById(jp.co.memory_tech.starchive.R.id.viewfinder_view);
        viewfinderView.setCameraManager(cameraManager);

        // resultView = findViewById(R.id.result_view);
        statusView = (TextView) findViewById(jp.co.memory_tech.starchive.R.id.status_view);

        handler = null;
        lastResult = null;

        resetStatusView();

        SurfaceView surfaceView = (SurfaceView) findViewById(jp.co.memory_tech.starchive.R.id.preview_view);
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        if (hasSurface) {
            initCamera(surfaceHolder);
        } else {
            // Install the callback and wait for surfaceCreated() to init the
            // camera.
            surfaceHolder.addCallback(this);
            surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
            initCamera(surfaceHolder);
        }

        beepManager.updatePrefs();

        inactivityTimer.onResume();

        // Intent intent = getIntent();

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        /*
         * copyToClipboard =
         * prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true) &&
         * (intent == null || intent.getBooleanExtra(Intents.Scan.SAVE_HISTORY,
         * true));
         */

        source = IntentSource.NONE;
        decodeFormats = null;
        characterSet = null;

    }

    @Override
    protected void onPause() {
        if (handler != null) {
            handler.quitSynchronously();
            handler = null;
        }
        inactivityTimer.onPause();
        cameraManager.closeDriver();
        SurfaceView surfaceView = (SurfaceView) findViewById(jp.co.memory_tech.starchive.R.id.preview_view);
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        surfaceHolder.removeCallback(this);
        hasSurface = false;
        super.onPause();
    }

    @Override
    protected void onStop() {
        // TODO Auto-generated method stub

        Log.i("Tamle", "Camera is onStop");
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        inactivityTimer.shutdown();
        Log.i("Tamle", "Camera is onDestroy");
        super.onDestroy();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (source == IntentSource.NATIVE_APP_INTENT) {
                setResult(RESULT_CANCELED);
                finish();
                return true;
            } else if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK)
                    && lastResult != null) {
                restartPreviewAfterDelay(0L);
                return true;
            }
        } else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
            // Handle these events so they don't launch the Camera app
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    public void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
        // Bitmap isn't used yet -- will be used soon
        if (handler == null) {
            savedResultToShow = result;
        } else {
            if (result != null) {
                savedResultToShow = result;
            }
            if (savedResultToShow != null) {
                Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
                handler.sendMessage(message);
            }
            savedResultToShow = null;
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        if (holder == null) {
            Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
        }
        if (!hasSurface) {
            hasSurface = true;
            initCamera(holder);
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        hasSurface = false;
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

    }

    /**
     * A valid barcode has been found, so give an indication of success and show
     * the results.
     * 
     * @param rawResult The contents of the barcode.
     * @param barcode A greyscale bitmap of the camera data which was decoded.
     */
    @Override
    public void handleDecode(Result rawResult, Bitmap barcode) {
        // inactivityTimer.onActivity();
        lastResult = rawResult;
        ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
        // historyManager.addHistoryItem(rawResult, resultHandler);

        if (barcode == null) {
            // This is from history -- no saved barcode
            handleDecodeInternally(rawResult, resultHandler, null);
        } else {
            beepManager.playBeepSoundAndVibrate();
            drawResultPoints(barcode, rawResult);
            switch (source) {
            /*
             * case NATIVE_APP_INTENT: case PRODUCT_SEARCH_LINK:
             * handleDecodeExternally(rawResult, resultHandler, barcode); break;
             * case ZXING_LINK: if (returnUrlTemplate == null) {
             * handleDecodeInternally(rawResult, resultHandler, barcode); } else
             * { handleDecodeExternally(rawResult, resultHandler, barcode); }
             * break;
             */
                case NONE:
                    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
                    if (prefs.getBoolean(PreferencesActivity.KEY_BULK_MODE, false)) {
                        Toast.makeText(this, R.string.msg_bulk_mode_scanned, Toast.LENGTH_SHORT)
                                .show();
                        // Wait a moment or else it will scan the same barcode
                        // continuously about 3 times
                        restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
                    } else {
                        handleDecodeInternally(rawResult, resultHandler, barcode);
                    }
                    break;
            }
        }
    }

    /**
     * Superimpose a line for 1D or dots for 2D to highlight the key features of
     * the barcode.
     * 
     * @param barcode A bitmap of the captured image.
     * @param rawResult The decoded results which contains the points to draw.
     */
    private void drawResultPoints(Bitmap barcode, Result rawResult) {
        ResultPoint[] points = rawResult.getResultPoints();
        if (points != null && points.length > 0) {
            Canvas canvas = new Canvas(barcode);
            Paint paint = new Paint();
            paint.setColor(getResources().getColor(R.color.result_image_border));
            paint.setStrokeWidth(3.0f);
            paint.setStyle(Paint.Style.STROKE);
            Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
            canvas.drawRect(border, paint);

            paint.setColor(getResources().getColor(R.color.result_points));
            if (points.length == 2) {
                paint.setStrokeWidth(4.0f);
                drawLine(canvas, paint, points[0], points[1]);
            } else if (points.length == 4 &&
                    (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A ||
                    rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
                // Hacky special case -- draw two lines, for the barcode and
                // metadata
                drawLine(canvas, paint, points[0], points[1]);
                drawLine(canvas, paint, points[2], points[3]);
            } else {
                paint.setStrokeWidth(10.0f);
                for (ResultPoint point : points) {
                    canvas.drawPoint(point.getX(), point.getY(), paint);
                }
            }
        }
    }

    private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
        canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
    }

    // Put up our own UI for how to handle the decoded contents.
    protected void handleDecodeInternally(Result rawResult, ResultHandler resultHandler,
            Bitmap barcode) {
        // statusView.setVisibility(View.GONE);
        viewfinderView.setVisibility(View.GONE);
        // Tamle
        barcode = Bitmap.createScaledBitmap(barcode, 80, 80, false);
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        barcode.compress(Bitmap.CompressFormat.PNG, 0, stream);
        byte[] byteArray = stream.toByteArray();

        CharSequence displayContents = resultHandler.getDisplayContents();

        HistoryBarcode historyBarcode = new HistoryBarcode();
        historyBarcode.setBarcode(displayContents.toString());
        historyBarcode.setImage(byteArray);

        SQLiteProvider sqLiteProvider = SQLiteProvider.getInstance(this, getPackageName());
        if (!sqLiteProvider.isBarcodeExisted(historyBarcode.getBarcode())) {
            sqLiteProvider.insertNewHistoryBarcode(historyBarcode);
        } else {
            Log.i("Tamle", "barcode has been read ago");
        }

        // //
        Activity activity = getParent();
        // I'm assuming were inside an Activity which is started by TabActivity
        if (activity instanceof MainActivity) {
            MainActivity ta = (MainActivity) activity;
            // // now determine the Tab you wanna start
            ta.changeTab(BarcodeReaderInfo.HISTORY, historyBarcode.getBarcode());

        }
    }

    private void initCamera(SurfaceHolder surfaceHolder) {
        layoutLoadingProgress = (LinearLayout) findViewById(R.id.loading);
        barcodeCaptureHandler = new BarcodeCaptureHandler();

        // Call the dialog progress when loading camera
        layoutLoadingProgress.setVisibility(View.VISIBLE);

        Log.i("Tamle", "Camera is init");
        try {
            cameraManager.openDriver(surfaceHolder);
            // Creating the handler starts the preview, which can also throw a
            // RuntimeException.
            if (handler == null) {
                handler = new CaptureActivityHandler(this, decodeFormats, characterSet,
                        cameraManager);
            }
            decodeOrStoreSavedBitmap(null, null);

            // Send message to dismiss the dialog when finish loading camera
            Message msg = new Message();
            msg.what = R.id.done_loading_camera;
            barcodeCaptureHandler.sendMessage(msg);

        } catch (IOException ioe) {
            Log.w(TAG, ioe);
            displayFrameworkBugMessageAndExit();
        } catch (RuntimeException e) {
            // Barcode Scanner has seen crashes in the wild of this variety:
            // java.?lang.?RuntimeException: Fail to connect to camera service
            Log.w(TAG, "Unexpected error initializing camera", e);
            displayFrameworkBugMessageAndExit();
        }

    }

    private class BarcodeCaptureHandler extends Handler {

        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            super.handleMessage(msg);
            switch (msg.what) {
                case R.id.done_loading_camera:
                    // Dismiss the loading dialog
                    layoutLoadingProgress.setVisibility(View.GONE);
                    break;

                default:
                    break;
            }
        }

    }

    private void displayFrameworkBugMessageAndExit() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(getString(jp.co.memory_tech.starchive.R.string.app_name));
        builder.setMessage(getString(jp.co.memory_tech.starchive.R.string.msg_camera_framework_bug));
        builder.setPositiveButton(jp.co.memory_tech.starchive.R.string.button_ok,
                new FinishListener(
                        this));
        builder.setOnCancelListener(new FinishListener(this));
        builder.show();
    }

    @Override
    protected void resetStatusView() {
        Log.i("Tamle", "resetStatusView");
        viewfinderView.setVisibility(View.VISIBLE);
        lastResult = null;
    }

    @Override
    public void drawViewfinder() {
        Log.i("Tamle", "drawViewfinder");
        viewfinderView.drawViewfinder();
    }

    @Override
    public void restartPreviewAfterDelay(long delayMS) {
        if (handler != null) {
            handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
        }
        resetStatusView();
    }
}
